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Sudoku Strategy Discussion...
"Now
You Can Learn How to Solve
All Levels of Sudoku Puzzles Fast!
My book, "Sudoku for Everyone: The Easy to
Understand Sudoku Strategy Guide for Beginners to Experts," is organized to build up from the basic to
more advanced strategies. Part 1 presents the basic and intermediate
strategies.
The strategies presented in Chapters 2 and 3 are variations on the same
theme – use known cell values from the board to exclude possibilities
for other cells. The strategies presented in Chapters 2 and 3 are
required to solve most easy puzzles, although the Chapter 2 strategies
may be sufficient in a few cases.
The more advanced strategies in Chapters 3 through 5 utilize deductive
logic to eliminate possibilities. Medium and hard puzzles require usage
of the strategies from Chapters 2 through 5.
You do not need to master all the strategies in this book to become a
proficient Sudoku solver. With the material in Chapters 2 through 5 you
will be well prepared for easy, medium, and hard puzzles. The more
advanced material is not necessary to solve hard puzzles, although it
can come in handy.
Extreme patterns and strategies, discussed in Part 2, use deductive
logic to recognize specific patterns of candidates, and these strategies
rely on the evaluation of the patterns. The purpose is not to solve
cells directly but to eliminate candidates and allow other strategies to
become useful. There are quite complex relationships that can be
established, and the challenge is to both understand the patterns that
are useful and become skilled at detecting those patterns. Part 2 should
be read only after you have become adept at applying the Part 1
strategies.
Extreme puzzles can range in difficulty, from very hard to incredibly
difficult. Some extreme puzzles can be solved using the strategies
presented in Chapters 2 through 5, and certainly those strategies will
be heavily utilized. As the puzzles extend further up the difficulty
scale, the extreme patterns and strategies from Chapters 6 trough 11
come into play.
The Appendix presents complete step-by-step solutions to easy, medium,
and hard puzzles. You will be able to see how to apply the techniques
to solve puzzles. I highly encourage you to go through all the problems
and to try to understand every step of the process, and try to work
through the logic yourself. The step-by-step process is somewhat
repetitive. The repetition is intentional and will greatly speed up your
mastery of the subject if you review and understand the diagrams. As you
go through the step-by-step solutions you will see my approach in
action. Once you’ve learned the strategies, you can decide for yourself
how you want to apply them.
As you move through the chapters, you will gain a greater appreciation
of the deductive logic that can be used and have more solving strategies
to choose from. Later, you can use each chapter as a resource to refresh
your memory on specific strategies.
I’m sure that by the end of this book you will understand Sudoku much
better, and you will be able to handily solve quite difficult puzzles.
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